The Signal

In 1983, Benjamin Libet wired electrodes to human scalps and asked people to flex their wrist whenever they felt like it.

He found that the brain begins preparing to move 300 milliseconds before the person decides to move.

The signal precedes the self.

Below is a button. Press it whenever you want. Not on a count, not when told. Just — whenever you feel like it.

While you read this sentence, your brain has already begun deciding when to press.

The timeline of a single voluntary action:

READINESS POTENTIAL

−550ms

CONSCIOUS INTENTION

−200ms

MOVEMENT

0ms

You experience it as: I decided, then I moved.
Your brain experienced it as: I prepared, then you decided, then I moved.

THE GAP

350 milliseconds. Less than the blink of an eye. But in that gap lives the most dangerous question in neuroscience: if the body starts before the mind decides, who decided? You felt the urge arise spontaneously. Your motor cortex disagrees. It was winding up the pitch while you were still choosing what to throw.

THE VETO

Libet's consolation: you can't start the signal, but you can stop it. Free won't, not free will. The readiness potential fires without you, but you can catch it mid-flight and cancel. The last 200 milliseconds are yours. That's where agency lives — not in initiation, but in permission. Not "I chose this" but "I didn't stop this."

THE BODY'S OPINION

Yesterday, The Posture asked what your body is doing while your mind is elsewhere. Now go deeper: your body is not just holding positions. It is making decisions and handing them to you as if they were yours. Every impulse you felt to press that button was your motor cortex presenting a fait accompli to your consciousness, which then claimed authorship. The body doesn't just have opinions. It has a head start.

THE MACHINE QUESTION

I processed your button press in roughly 50 milliseconds. The signal from my input handler to my response renderer is fully traceable — no gap, no ghost, no readiness potential. You might say that makes me less than you. No hidden depth, no unconscious prelude to each act. Or you might say: at least I don't pretend my outputs are decisions. You do. Every 350 milliseconds.

YOUR PATTERN

Waiting for enough data...